精选优质文档-倾情为你奉上(1)Concrete and reinforced concrete are used as building materials in every country. In many, including Canada and the United States, reinforced concrete is a dominant structural material in engineered construction. (1)混凝土和钢筋混凝土在每个国家都被用作建筑材料。在许多国家，包括加拿大和美国，钢筋混凝土是一种主要的工程结构材料。(2)The universal nature of reinforced concrete construction stems from the wide availability of reinforcing bars and the constituents of concrete, gravel, sand, and cement, the relatively simple skills
